Dear Visa Officer:
The reasons that I didn’t arrive in HK on last visa and have to reapply the visa are as below:
1. The purpose that I applied for tourist visa last time is that I would like to attend an exhibition hold at Hong Kong. But unfortunately, the visa was issued too late that I have missed the exhibition time and that’s why I didn’t go.
2. This year I would like to attend the exhibition again, and hope that I can be granted a visa timely.
Your favorable consideration will be much appreciated.
Yours sincerely.
XXX(名字)
請采納，謝謝！